Obtained 31 stack frames.
/usr/games/crawl-git-4f6bc678fa(_Z17write_stack_traceP8_IO_FILE+0x3f) [0x55df21e1afcf]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-4f6bc678fa(_Z20crash_signal_handleri+0x18f) [0x55df21e1b3ef]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fda41cee210]: 
/lib/x86_64-linux-gnu/libc.so.6(sigprocmask+0x4b) [0x7fda41cee48b]: 
/lib/x86_64-linux-gnu/libc.so.6(abort+0xb4) [0x7fda41ccd7e2]: 
/usr/games/crawl-git-4f6bc678fa(+0x4242f2) [0x55df21e222f2]: 
/usr/games/crawl-git-4f6bc678fa(+0x424616) [0x55df21e22616]: 
/usr/games/crawl-git-4f6bc678fa(+0xa41f92) [0x55df2243ff92]: 
/usr/games/crawl-git-4f6bc678fa(_ZN14TilesFramework14send_milestoneERK11xlog_fields+0x128) [0x55df224425c8]: TilesFramework::send_milestone(xlog_fields const&)
/usr/games/crawl-git-4f6bc678fa(_Z14mark_milestoneRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES6_S6_l+0x4c2) [0x55df21f8a1f2]: mark_milestone(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, long)
/usr/games/crawl-git-4f6bc678fa(_Z13do_crash_dumpv+0x245e) [0x55df21e24bee]: do_crash_dump()
/usr/games/crawl-git-4f6bc678fa(_Z20crash_signal_handleri+0x1fa) [0x55df21e1b45a]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7fda41cee210]: 
/lib/x86_64-linux-gnu/libpthread.so.0(raise+0xcb) [0x7fda41eaf24b]: 
/usr/games/crawl-git-4f6bc678fa(+0x4242ed) [0x55df21e222ed]: 
/usr/games/crawl-git-4f6bc678fa(+0x4244a5) [0x55df21e224a5]: 
/usr/games/crawl-git-4f6bc678fa(+0x882e49) [0x55df22280e49]: 
/usr/games/crawl-git-4f6bc678fa(_ZN4bolt6bounceEv+0x39) [0x55df21dcbb89]: bolt::bounce()
/usr/games/crawl-git-4f6bc678fa(_ZN4bolt7do_fireEv+0xb2b) [0x55df21dddaab]: bolt::do_fire()
/usr/games/crawl-git-4f6bc678fa(_ZN4bolt4fireEv+0x428) [0x55df21dde438]: bolt::fire()
/usr/games/crawl-git-4f6bc678fa(_Z9mons_castP7monster4bolt10spell_type13enum_bitfieldI19mon_spell_slot_flagLi12EEb+0x38d) [0x55df22131b1d]: mons_cast(monster*, bolt, spell_type, enum_bitfield<mon_spell_slot_flag, 12>, bool)
/usr/games/crawl-git-4f6bc678fa(_Z16handle_mon_spellP7monster+0x10f0) [0x55df2213b790]: handle_mon_spell(monster*)
/usr/games/crawl-git-4f6bc678fa(+0x70cd6f) [0x55df2210ad6f]: 
/usr/games/crawl-git-4f6bc678fa(_Z19handle_monster_moveP7monster+0x1b08) [0x55df22112dc8]: handle_monster_move(monster*)
/usr/games/crawl-git-4f6bc678fa(_Z15handle_monstersb+0xb12) [0x55df22114622]: handle_monsters(bool)
/usr/games/crawl-git-4f6bc678fa(_Z12world_reactsv+0xf9) [0x55df22458cf9]: world_reacts()
/usr/games/crawl-git-4f6bc678fa(+0xa5cbd3) [0x55df2245abd3]: 
/usr/games/crawl-git-4f6bc678fa(+0xa5d62d) [0x55df2245b62d]: 
/usr/games/crawl-git-4f6bc678fa(main+0x1a5) [0x55df21d73b75]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7fda41ccf0b3]: 
/usr/games/crawl-git-4f6bc678fa(_start+0x2e) [0x55df21d7468e]: